Does China have more influence over South Korea than North Korea?

Does China have more influence over South Korea than North Korea?

Special to WorldTribune.com By Donald Kirk, EastAsiaIntel.com We keep hearing about all the influence the Chinese have over North Korea. If only they’d exert their power, maybe cut off or slow down the flow of oil that’s the lifeblood of the country, then the North Koreans would start talking seriously about giving up their nukes. […]